Suppose there are 4,000 bacteria in a sample. The population of the bacteria doubles exponentially every hour how many hours will it take for the bacteria to reach a population of 50,000

After 4 hours there will be 64 000

3 - 32k
2-16
1-8

do you need exactly 50 000?

Katie invests $5,000 in an account earning 4% interest, compounded annually for 5 years. two years after katie's initial investment, emily invests $10,000 in an account earning 4% interest, compounded annually for 3 years. given that no additional deposits are made, compare the amount of interest earned after the interest period ends for each account. (round to the nearest dollar)